Used to be on big contactors (relays) they would use magnets to blow out the arc and save the contact pad. Its still done too, its called a mag blow out. Anyways with my mig if I get a magnet real close to the arc it will snuff it or push the arc away, other times it will send the filler in the wrong direction. I only ever used a magnet close to the gun once for a tack on a very small part. Took double everything including time.
Son of usmcpop. Lincoln SP175+, Miller Syncrowave 250, Miller Dialarc 250 AC/DC, Victor O/A, Index 745 Mill, Clausing 5904 lathe, Harbor Freight 8x12 lathe.
Accurate is a relative term...right?